Workers will be putting steel columns in place that will make the unfinished frame of the building a little more than 1,250 feet high. That's just high enough to peek over the roof of the observation deck at the Empire State building.

The so-called "Freedom Tower" isn't expected to reach its full height for at least another year. Counting a 408-foot-tall needle, it's expected to be the tallest building in the U.S., and the third tallest in the world.